By Pietro Vincenzini, Cristina Leonelli
The 26 peer-reviewed papers gathered the following jointly supply a plenitude of updated details on “Geopolymers and Geocements: Low Environmentally influence Ceramic Materials”. The papers are very easily prepared into education, CHARACTERIZATION, INDUSTRIALIZATION & APPLICATION.
This distinct quantity has additionally been released on-line within the sequence, “Advances in technological know-how and expertise” Vol. sixty nine through www.scientific.net.
The Congress is being documented in 10 topical volumes. This 8th quantity covers guidance, characterization, industrialization, and alertness of the 2 forms of ceramics. The keynote lecture is The prestige and Prospect of study and alertness of Alkali-Activated fabrics, by means of Pavel Krivenko (binders and fabrics, Kiev nationwide U. of Civil Engineering and structure, Ukraine). one other 25 papers give some thought to such themes as geopolymer binders in composite cements and ceramic-like fabrics, the position of alkaline cations in geomaterial foams, new geopolymers according to electrical arc furnace slag, bond strengths in geopolymer and cement concretes, and recycling business wastewater through immobilizing it in geopolymer cement.
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Extra info for 12th INTERNATIONAL CERAMICS CONGRESS PART H. Geopolymers and Geocements: Low Environmentally Impact Ceramic Materials
8 that pull-off test provides more conservative value than flexural test but the results are in agreement well with each other. Similar with the results in flexural test, all of MPC repaired samples have obviously higher bond strength than OPC repaired specimen. Since the bond strengths at M/P of 6 and 8 are very close and notably higher than that at M/P of 10 and 12, it is believed that the pull-off strength may not be improved. But if the M/P ratio is further decreased the cost of the repair material would be increased much due to higher cost of KDP.
For further improving the application properties of the iron-phosphate binders, an addition of Basalt (B, d50 = 110 um) and Fly Ash (FA, d50 = 40 µm) powders to the fresh mixtures has been tested. The slight basic mineral powders increase the stability of the acidic iron-phosphate networks against water attack. Because of that, the prepared composite prisms (28d) demonstrate a good shape resistance in boiling water (2 h). In Fig. 10 the effect of the basic mineral powders on the materials strength is shown.
5 0 7 14 Curing time (days) 21 28 Fig. 7 – Flexural bond strength of MPC mortar with different M/P ratios It is well accepted that the adhesion of the repair material to the old OPC interface is dependent on material compaction, moisture content of repair surface and roughness of interface. It is believed there should exist some chemical interlock between MPC and OPC substrate that improve the bond performance of MPC. For a small M/P ratio, the more hydrates is available to lubricate the mortar.